mod_s2s_auth_dane_in: Fix caching SHA2-512 hash This unintentionally stored the SHA2-512 hash in the slot for SHA2-256, so that if something compares the same entry again against a SHA2-256 hash it would fail. However a matching SHA2-512 entry should still match. RFC 7671 RECOMMENDS SHA2-256 so SHA2-512 entries are expected to be less common. DANE support not being enabled by default. Expected impact is low.